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rustlings/exercises/error_handling/errors4.rs
Taylor Yu 50ab289da6 fix: rename result1 to errors4
Also put it in the ERROR HANDLING section where it probably belongs.
2021-06-06 23:08:54 -05:00

30 lines
667 B
Rust

// errors4.rs
// Make this test pass! Execute `rustlings hint errors4` for hints :)
// I AM NOT DONE
#[derive(PartialEq, Debug)]
struct PositiveNonzeroInteger(u64);
#[derive(PartialEq, Debug)]
enum CreationError {
Negative,
Zero,
}
impl PositiveNonzeroInteger {
fn new(value: i64) -> Result<PositiveNonzeroInteger, CreationError> {
Ok(PositiveNonzeroInteger(value as u64))
}
}
#[test]
fn test_creation() {
assert!(PositiveNonzeroInteger::new(10).is_ok());
assert_eq!(
Err(CreationError::Negative),
PositiveNonzeroInteger::new(-10)
);
assert_eq!(Err(CreationError::Zero), PositiveNonzeroInteger::new(0));
}